Unit 3 Science and nature Welcome to the unit

To get a general idea of what we are going to learn in this unit To know something about clone To learn to discuss about clone or cloned animals

Do you think the fast development of science and technology has been good for nature? Why or why not? How should science and nature relate to each other? Do you think that human beings should try to control nature? Should we do anything against the laws of nature?

Do you know something about cloning ( 克隆 )? Man has created many things and now they are even ready to recreate themselves.

“Cloning” is a new biotechnology ( 生物技术 ) which aims to produce an exact copy of an animal or a plant from its own cells, DNA fragments ( 片段 ) or organisms ( 有 机体 ) in an asexual ( 无性繁殖的 ) way.

Cloned animals

What do you see from this video?

Dolly and its creator

What do you know about Dolly? the world’s first cloned mammal created by Scottish scientists in 1996 died in 2003 because of lung disease many countries have banned human cloning since Dolly’s birth

Look at the following pictures and study them. Can you tell what is the main feature of cloning? Can you identify the differences between the cloned animals and normal ones?

Dolly is together with her mother. What do you know about Dolly?

the world’s first cloned mammal created by Scottish scientists in 1996 sparked worldwide interest and concern after its birth many countries, including Germany, France, Canada, Switzerland, Austria, Norway and South America, have banned human cloning since Dolly’s birth died in 2003 because of lung disease

The kitten in the picture is called CC. Its name is from “Copycat”. It was born in December 2002.

The researchers in Texas produced CC with a cell taken from her mother Rainbow. CC was a healthy kitten who grew into a lively affectionate house cat. She is not the exact copy of her clone-mother because they grew up in different surroundings, though the shared the same genes.

These female pigs are also cloned. They were born on Christmas Day They were Noel, Angel, Star, Joy and Mary.

Although they are not the first cloned pigs, they are actually the first to be engineered in a way that their organs more suitable for transplantation into humans. Due to the shortage of human organs for transplants, many people are dying because some of their organs do not work. It is hoped that the organs from these pigs will be used in human’s bodies.

The name of the first cloned monkey is ANDi. It is from “inserted DNA” spelt backwards. The playful coffee- coloured monkey was born in The technology is different from that used for Dolly.

Researchers in Oregon, the USA created this first genetically modified monkey by putting a gene form a jellyfish, another species, into six-day-old monkey embryos ( 胚胎 ).

From the appearance, the cloned animals are exactly the same as the original ones. However, some cloned animals were reported to have health problems and died usually young.

The pair of calves were born on 5 July 1998 in Ishikawa, Japan. They were two years younger than Dolly, being second adult animal clones in the world. More examples about cloned animals

The mule in the picture is the world’s first cloned mule. It was born on 4 May His name is Idaho Gem.

In 1962, the scientist Gurdon from Cambridge cloned a tadpole

In 1963, Chinese scientist Tong Dizhou cloned a carp, which was 33 years earlier than Dolly.

Born in 2005 in Seoul University in Korea Snoopy

What do you think of the new kind of technology? Does it have any advantages or disadvantages?

Advantages of cloning: cure many genetic diseases save people’s lives prevent some endangered animals from dying out Disadvantages of cloning: cause ethical problems violate ( 违背 ) human rights violate the laws of nature …

Do you think it would be a good idea to clone humans some day? Why or why not?

It is a good idea, for… reasons: 1.Cloning can help cure many diseases and save a lot of people’s lives. 2. … 3. … Party A

It is a bad idea, for… : reasons : 1.Cloning can lead to ethical ( 伦理 ) problems. 2. … 3. … Party B

If possible, do you want another person to be exactly the same as you?

Just imagine Supposing you are facing your second self who looks like you, talks like you and thinks like you, how do you feel?

One man, one world?

Funny pictures If cloning goes in a wrong direction, what will happen? A dog or an eagle?

A duck or a crocodile?

A cock or a dog?

A lion or a kangaroo?

A frog or a crocodile?

A tortoise or a bear?

A bird or a dog?

A dog or a man?

Who is this?

克隆如何才能和谐？

Think about what we’ve just learnt today. Study without reflection is a waste of time. After the class It’s time to stop the class for you to look back in silence.

Homework Write a short passage about whether it is a good idea to clone humans. Today our class had a discussion about whether it is a good idea to clone humans. Some students think that it is good, for… However, some other students think it is not a good idea, for… In my opinion, …